Can color-blindness be considered a disability?

My 17 year old son was diagnosed with red-green color blindness a couple years ago. I'm just wondering, can color blindness be considered a disability? I'm speaking from the standpoint of, he took Art in school and barely passed because there were a lot of coloring assignments and he used a lot of the wrong colors so his grade was bad till the teacher was made aware of the color-blindness then he got less coloring assignments. Here at home, unless he's using a meat thermometer, he's unable to tell whether or not meats are cooked to a safe temperature. Without a meat thermometer, he could poison himself! He'll be going to college soon so I was just curious to know if it's a covered illness? He drives but cannot tell the difference in street lights, just knows that when the top is lit it means stop etc etc.